Product Overview

This high-performance piston is engineered as a direct replacement for the Cummins ISB5.9 diesel engine, part number 3946153. Designed to meet or exceed OEM specifications, it is a critical component for engine rebuilds and repairs. We specialize in the global distribution of heavy-duty engine components, serving major markets across North America, Europe, the Asia-Pacific region, and the Middle East with reliable shipping and export compliance.

Key Features & Benefits

• Precision Engineering: Manufactured to exact OEM dimensions and tolerances for a perfect fit and optimal engine performance.
• Enhanced Durability: Constructed from high-grade materials to withstand the high compression and thermal stresses of diesel operation.
• Restored Engine Power: Direct replacement helps restore factory compression ratios and engine efficiency.
• Global Supply Chain: Stocked and ready for fast dispatch to major industrial hubs and ports worldwide.
• Comprehensive Support: Backed by technical documentation, including machinery test reports and quality inspections.

Technical Specifications

OEM Cross-Reference

This piston is a direct replacement for the following OEM part number:

• Cummins: 3946153

Note: Always verify part number compatibility with your specific engine serial number before purchase.

Compatibility

This piston is designed for the Cummins ISB5.9 diesel engine platform. Typical vehicle and machinery applications include, but are not limited to:

• Heavy-Duty Trucks
• City and Coach Buses
• Construction Equipment: Excavators, Bulldozers, Loaders
• Industrial Machinery: Forklifts, Generator Sets

Global Supply & Distribution

We are a trusted supplier in the international B2B automotive parts network. Our logistics are optimized for fast, reliable delivery to key global markets:

• Major Markets Served: United States, Canada, United Kingdom, Germany, Australia, UAE, Saudi Arabia, South Africa, and Southeast Asia.
• Efficient Logistics: We ship via air and sea freight to all major ports and inland freight centers, ensuring timely delivery for your project timelines.
• Export Expertise: All documentation (commercial invoice, packing list, certificate of origin) is provided professionally, ensuring smooth customs clearance worldwide.

Quality Assurance

Every component is subject to a rigorous quality control process to ensure it meets the demands of professional engine rebuilders and fleet operators.

• Manufacturing Standards: Produced in ISO-certified facilities using advanced machining and metallurgy.
• Inspection & Testing: Each batch undergoes dimensional checks and material analysis. A Machinery Test Report is available upon request.
• Video Outgoing-Inspection: Available to provide visual confirmation of product quality and packaging prior to shipment.
• Warranty: Protected by a 6-month warranty against manufacturing defects, providing peace of mind for your investment.

FAQ

Q: Is this piston sold as a single unit or as a set for the entire engine?
A: This piston is sold as a single item. For a complete engine rebuild, you will need to purchase a set matching the number of cylinders in your ISB5.9 engine (typically 6). Please contact us for set pricing and availability.

Q: Does this part require any machining or modification before installation?
A: No. This is a direct replacement piston manufactured to OEM size. It is designed for a precise fit within the standard cylinder liner. However, standard professional engine rebuilding practices, such as measuring cylinder bore and checking clearances, should always be followed.

Q: Do you provide the piston rings and wrist pin with this piston?
A: This listing is for the piston assembly as pictured. It typically includes the piston body, wrist pin, and circlips. Piston rings are usually sold separately. Please confirm the exact included components with our sales team before ordering to ensure you have all necessary parts for assembly.

Our advantages

1.An authorized wholesaler of Isuzu genuine parts, Hino genuine parts, Mitsubishi genuine parts and Mahle parts.

2. We are not only supply genuine parts, but also high quality OEM parts, which are made in China or made in Japan.

3. More than 10 years of experience in machinery parts, professional supply of diesel engine parts.

4. Fast delivery, the fastest can be shipped in one day ,more than 500,000 of different types parts in stock.

5. Scientific ERP system, easy and fast to locate the parts that customer needs.

6. Professional technician checks the parts before delivery, to make sure the parts are correct, usable and defect-free.

Exhibition

Packing&Shipping

1.  Our shipment is by air/sea/express (DHL/FEDEX/TNT/UPS/EMS).

2.  Once we get confirmation of payment, we will ship products in 2 days.

3.  Our packaging is standard export wooden box or others as your requirement.

4. We’ll check and test the products before shipping , and givethe pictures to our customers to confirm.

FAQ

Q1. What is your company major products?

A: Our main products are Liner kit, Piston, Rings, Liner, Gasket kit, Bearing, Injection pump, Nozzle, Water pump, Oil pump,Crankshaft, Turbocharger,Filter, etc.

Q2.What is the MOQ?

A: Normally we can supply any quantity if we have in stock.

Q3. What is your payment term ?

A: We accept Western Union, T/T, Paypal.

Q4. What is the packing ?

A: Carton or wooden case , If you want to put your logo on the packing , We will do it after get your authorization letter.

Q5. When can you deliver products after payment ?

A: By Express ,usually might take 3-4 days ;By Air , Usually take 7-9 days ; By Sea ,usually take 1-2 months .

Q6. What can you do to complete order perfectly ?

A: In the beginning , We will communicate with clients in details to understand what they need .

Before packing , We will check the products and send photos to clients .After confirmation ,

We will packing products well to avoid damage . Once we get tracking number ,

We will send it to customer and keep contact in with clients .